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Thermohydrodynamic analysis of thrust-bearing with circular pads running on bubbly oil (BTHD-theory)
(1985)
Lignite biosolubilization and bioconversion by Bacillus sp.: the collation of analytical data
(2020)
The carbonized rice husk (CRH) was evaluated for its wound healing activity in rats using excision models. In this study, the influences of CRH on wound healing in rat skin in vivo and cellular behavior of human dermal fibroblasts in vitro were investigated. The obtained results showed that the CRH treatment promoted wound epithelization in rats and exhibited moderate inhibition of cell proliferation in vitro. CRH with lanolin oil treated wounds were found to epithelize faster as compared to controls.
Biotechnologie und die mit ihr verbundenen technischen Prozesse prägen seit Jahrtausenden die Entwicklung der Menschheit. Ausgehend von empirischen Verfahren, insbesondere zur Herstellung von Lebensmitteln und täglichen Gebrauchsgütern, haben sich diese Disziplinen zu einem der innovativsten Zukunftsfelder entwickelt. Durch das immer detailliertere Verständnis zellulärer Vorgänge können mittlerweile Produktionsstämme gezielt optimiert werden. Im Zusammenspiel mit moderner Prozesstechnik können so eine Vielzahl von Bulk- und Feinchemikalien sowie Pharmazeutika effizient hergestellt werden. In diesem Artikel werden exemplarisch einige der aktuellen Trends vorgestellt.
For several thousand years, biotechnology and its associated technical processes have had a great impact on the development of mankind. Based on empirical methods, in particular for the production of foodstuffs and daily commodities, these disciplines have become one of the most innovative future issues. Due to the increasing detailed understanding of cellular processes, production strains can now be optimized. In combination with modern bioprocesses, a variety of bulk and fine chemicals as well as pharmaceuticals can be produced efficiently. In this article, some of the current trends in biotechnology are discussed.
In the field of biotechnology and molecular biology, the use of small liquid volumes has significant advantages. In particular, screening and optimization runs with acceptable amounts of expensive and hardly available catalysts, reagents, or biomolecules are feasible with microfluidic technologies. The presented new microfluidic system is based on the inclusion of small liquid volumes by a protective shell of magnetizable microparticles. Hereby, discrete aqueous microreactor drops with volumes of 1–30 μL can be formed on a simple planar surface. A digital movement and manipulation of the microreactor is performed by overlapping magnetic forces. The magnetic forces are generated by an electrical coil matrix positioned below a glass plate. With the new platform technology, several discrete reaction compartments can be moved simultaneously on one surface. Due to the magnetic fields, the reactors can even be merged to initiate reactions by mixing or positioned above surface-immobilized catalysts and then opened by magnetic force. Comparative synthesis routes of the magnetizable shell particles and superhydrophobic glass slides including their performance and stability with the reaction platform are described. The influence of diffusive mass transport during the catalyzed reaction is discussed by evaluation finite element model of the microreactor. Furthermore, a first model dye reaction of the enzyme laccase has been established.
Retinal Vessel Analysis (RVA) in the context of subarachnoid hemorrhage: A proof of concept study
(2016)
Heat production in the windings of the stators of electric machines under stationary condition
(2014)
Simulation model for the transient process behaviour of solar aluminium recycling in a rotary kiln
(2015)
Two of the main environmental problems of today’s society are the continuously increasing production of organic wastes
as well as the increase of carbon dioxide in the atmosphere and the related green house effect. A way to solve these
problems is the production of biogas. Biogas is a combustible gas consisting of methane, carbon dioxide and small
amounts of other gases and trace elements. Production of biogas through anaerobic digestion of animal manure and
slurries as well as of a wide range of digestible organic wastes and agricultural residues, converts these substrates into
electricity and heat and offers a natural fertiliser for agriculture. The microbiological process of decomposition of
organic matter, in the absence of oxygen takes place in reactors, called digesters. Biogas can be used as a fuel in a gas
turbine or burner and can be used in a hybrid solar tower system offering a solution for waste treatment of agricultural
and animal residues. A solar tower system consists of a heliostat field, which concentrates direct solar irradiation on an
open volumetric central receiver. The receiver heats up ambient air to temperatures of around 700°C. The hot air’s heat
energy is transferred to a steam Rankine cycle in a heat recovery steam generator (HRSG). The steam drives a steam
turbine, which in turn drives a generator for producing electricity. In order to increase the operational hours of a solar
tower power plant, a heat storage system and/ or hybridization may be considered. The advantage of solar-fossil hybrid
power plants, compared to solar-only systems, lies in low additional investment costs due to an adaptable solar share and
reduced technical and economical risks. On sunny days the hybrid system operates in a solar-only mode with the central
receiver and on cloudy days and at night with the gas turbine only. As an alternative to methane gas, environmentally
neutral biogas can be used for operating the gas turbine. Hence, the hybrid system is operated to 100% from renewable
energy sources
